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ISO 3763:1976
Wrought steels - Macroscopic methods for assessing the content of non-metallic inclusions
Macroscopic methods deal with non-metallic inclusions visible to the naked eye or with the aid of a magnifying glass with a magnification of not more than X 10. Only inclusions equal to or greater than 1 mm long are taken into consideration. Covers the blue fracture test method, the step machined test method, the magnetic particle inspection method.
International Organization for Standardization [iso]